Businesses in the computers category supply, configure and maintain desktop computers, laptops and related equipment for home users and organisations. They may sell new or refurbished devices, monitors, keyboards, printers, storage drives, networking equipment and accessories. Some offer advice on choosing systems for everyday use, study, creative work or business needs, and can install operating systems and common software or transfer files and settings from an older device. Computer businesses may also provide repairs and technical support, including diagnosing hardware faults, replacing components, removing unwanted software and improving performance. Services can include setting up wireless networks, connecting peripherals, backing up data and helping customers with security, updates and routine maintenance. The range of work varies: some businesses focus on retail, while others specialise in repairs, IT support or equipment for organisations.